One is to look at the tags I use. For example, if I'm talking about writing, I generally use the tag /process/. So the url:
Will show you only those posts. Likewise posts with photos in them are /photos/, posts about the_child are /child/, posts about Mainspring are /mainspring/ and so forth.
Also, if you remember a particular word or phrase I might have used, or are looking for something I probably didn't tag, try:
Search for /jaylake/ (which is my lj handle and how Google indexes this blog) and /Norwescon/ or whatever term or terms you want. That part of Google basically indexes all of LiveJournal.
Of course, you can always post a comment asking me, too.